WebGLRenderingContext: getProgramInfoLog() method

{{APIRef("WebGL")}}{{AvailableInWorkers}}

The WebGLRenderingContext.getProgramInfoLog returns the information log for the specified {{domxref("WebGLProgram")}} object. It contains errors that occurred during failed linking or validation of WebGLProgram objects.

Syntax

getProgramInfoLog(program)

Parameters

• program
  • : The {{domxref("WebGLProgram")}} to query.

Return value

A string that contains diagnostic messages, warning messages, and other information about the last linking or validation operation. When a {{domxref("WebGLProgram")}} object is initially created, its information log will be a string of length 0.

Examples

Checking program errors

const program = gl.createProgram();

// Attach pre-existing shaders
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);

gl.linkProgram(program);

gl.getProgramInfoLog(program);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("WebGLRenderingContext.getShaderInfoLog()")}}
• {{domxref("WebGLRenderingContext.getError()")}}